CN213788021U - Lotus-root-shaped gradient pore structure porous titanium alloy lumbar interbody fusion cage - Google Patents
Lotus-root-shaped gradient pore structure porous titanium alloy lumbar interbody fusion cage Download PDFInfo
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- CN213788021U CN213788021U CN202022488805.9U CN202022488805U CN213788021U CN 213788021 U CN213788021 U CN 213788021U CN 202022488805 U CN202022488805 U CN 202022488805U CN 213788021 U CN213788021 U CN 213788021U
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Abstract
The utility model relates to a lotus root form gradient pore structure's porous titanium alloy lumbar vertebrae interbody fusion cage, it includes: the fusion cage body is a structural part formed by repeatedly stacking a plurality of fusion cage elements which are arranged in an array manner, the cross section of the fusion cage body is in a fusiform shape, and the top and the bottom of the sagittal plane of the fusion cage body are respectively in an inclined plane shape or a convex cambered surface shape; the fusion device pore passage comprises a circular through hole which is communicated with the fusion device elements and is in a lotus-shaped bionic porous structure, and cylindrical intersection holes formed between the adjacent fusion device elements; the fusion cage notches are at least one pair in number and are respectively arranged on one side of the fusion cage body. The utility model discloses can match bone structure better, more be favorable to the bone to fuse, prevent the appearance of intervertebral fusion ware phenomenon of sinking simultaneously.
Description
Technical Field
The utility model belongs to the technical field of orthopedic implant, especially, relate to a porous titanium alloy lumbar vertebrae interbody fusion cage of lotus root form gradient pore structure.
Background
The spine interbody fusion is an important means for treating spine degenerative diseases with neck pain, waist pain and leg pain as main symptoms, and the success rate of the operation is greatly improved due to the appearance of the interbody fusion cage. The classical intersomatic cage is designed with a hollow cylindrical shape: the outer wall of the intervertebral disc provides the supporting strength required by intervertebral fusion by the strength of the material; the hollow design of the bone graft allows filling of granular autogenous bone and allogeneic bone granules, fusion is promoted by means of osteoinduction of implanted bone, and early autogenous bone graft is gradually clinically eliminated due to high complications. Currently, the intervertebral fusion cage almost replaces autologous bone and allogeneic bone and becomes the first choice material for clinical intervertebral fusion.
The interbody fusion cage needs to meet the requirements of mechanics and biology, has a certain supporting structure and a proper elastic modulus, can better match bone structures and provide enough space for cell adhesion, has good osseointegration capability, and achieves osseointegration. At present, the intervertebral fusion cage which takes polyether ether ketone (PEEK) materials as main materials and takes high polymer materials with low elastic modulus and medical titanium alloy with high elastic modulus as two main materials has the common sinking phenomenon, so that the stability of the intervertebral fusion cage is greatly reduced, and the three reasons are mainly as follows:
1. the mismatch of the elastic modulus of the intervertebral cage and the vertebral body contact part leads to the subsidence of the cage.
2. The intervertebral cage prosthetic implant does not match the vertebral body bone structure.
3. There is no biological form of bonding (bony fusion) between the intervertebral cage prosthetic implant and the host bone.
4. The shape and the size of the interbody fusion cage are fixed and are not matched with the intervertebral space, so that the individual requirements of patients cannot be met.
Therefore, based on the problems, the porous titanium alloy lumbar interbody fusion cage with the lotus-root-shaped gradient pore structure is provided for solving the problem that the existing interbody fusion cage is easy to sink and unstable in the follow-up process, and has important practical significance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the above-mentioned prior art, provide a solve present interbody fusion cage follow-up visit easy the lotus root form gradient pore structure's of taking place the problem of sinking, unstable phenomenon between the process porous titanium alloy lumbar vertebrae interbody fusion cage.
The utility model discloses a solve the technical scheme who takes of this problem and be: a lotus-shaped gradient pore structure's porous titanium alloy lumbar vertebrae interbody fusion cage, it includes:
the fusion cage body is a structural part formed by repeatedly stacking a plurality of fusion cage elements which are arranged in an array manner, the cross section of the fusion cage body is in a fusiform shape, and the top and the bottom of the sagittal plane of the fusion cage body are respectively in an inclined plane shape or a convex cambered surface shape;
the fusion device pore passage comprises a circular through hole which is communicated with the fusion device elements and is in a lotus-shaped bionic porous structure, and cylindrical intersection holes formed between the adjacent fusion device elements;
the fusion cage notches are at least one pair in number and are respectively arranged on one side of the fusion cage body.
Preferably, the upper end and the lower end of the fusion cage body are respectively provided with an upper fusion cage tooth and a lower fusion cage tooth, and the upper fusion cage tooth and the lower fusion cage tooth are respectively distributed at equal intervals along the outer edges of the upper end and the lower end of the fusion cage body.
Further preferably, the upper teeth of the fusion cage are divided into a front group and a rear group, the number of the upper teeth of each fusion cage is at least five, the upper teeth of each fusion cage are respectively and uniformly distributed at the edge of the upper end of the fusion cage body in the front-back direction, the lower teeth of each fusion cage are divided into a front group and a rear group, each group of the lower teeth of each fusion cage is at least five, and the lower teeth of each fusion cage are respectively and uniformly distributed at the edge of the lower end of the fusion cage body in the front-back direction.
Further preferably, the fusion cage body is a structural member integrally printed with a titanium alloy material by an electron beam melting technology of 3D printing.
Preferably, the fuser unit is arranged in a rectangular array and repeatedly stacked to form a fuser body with a cubic structure.
Preferably, the adjacent fuser primitives are arranged in a staggered manner, so that any two adjacent fuser primitives and the nearest fuser primitive are arranged in an equilateral triangle, and are repeatedly stacked to form a fuser body with a hexagonal structure.
Further preferably, the cage cells have a cylindrical structure, the diameter of each cage cell is between 1.5 mm and 5.5mm, the number of circular through holes in each cage cell is between 2mm and 6mm, the surfaces of the circular through holes are rough, and the diameter of each circular through hole is between 200 μm and 1000 μm.
Further preferably, the cross section of the cylindrical intersection hole is one or more of a curved diamond hole and a curved triangular hole.
Preferably, the size and shape of the top of the fusion cage are matched with the lower surface of the upper vertebral body of the lesion, the fusion cage is in an inclined plane shape or an upward convex cambered surface shape, the size and shape of the bottom of the fusion cage are matched with the upper surface of the lower vertebral body of the lesion, the fusion cage is in an inclined plane shape or a downward convex cambered surface shape, and the top and the bottom of the fusion cage body are inclined downwards from the front edge of the fusion cage to the rear edge of the fusion cage.
Further preferably, the height of the fusion cage body is between 8 and 16 mm.
The utility model has the advantages and positive effects that:
1. the utility model discloses a gradient structural design can match bone structure better, more is favorable to the bone to fuse, prevents the appearance of intervertebral fusion ware sunken phenomenon simultaneously.
2. The utility model discloses in, circular through-hole is the bionical simulation to lotus root open through-hole, for upper and lower through-hole, has fluid permeability, can regard as the passageway of oxygen and nutrient substance material transportation, is favorable to cell proliferation, migration and vascularization to form, is favorable to nutrient substance's absorption and metabolic waste's discharge, and the bone cell proliferation of being convenient for, migration and vascularization form make and reach the combination (the osseous combination) of biological form between host bone and the Cage false body implant, maintain the long-term stability of Cage.
3. The utility model discloses in, the open circular through-hole of lotus root can also reduce the elastic modulus of titanium alloy and make it and the elastic modulus phase-match of centrum, and the elastic modulus who matches avoids stress to shelter from the effect, more does benefit to the integration of bone to can prevent the emergence of phenomenon of sinking.
4. The utility model discloses in, circular through-hole surface is crude, helps strengthening cell adhesion and promotes the cell differentiation, can directly influence osteogenic activity, reaches the purpose that the osseous nature combines.
5. The utility model discloses in, one side/both sides of fusing the ware body have been seted up at least a pair of fusing ware notch, are convenient for add with implanting device and hold, and then conveniently implant the human body.
6. The utility model discloses in, the upper and lower end that fuses the ware body still is equipped with respectively fuses the ware and goes up tooth, fuses the ware and down the tooth, helps further increasing the stability between fusion ware body and the centrum.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a schematic three-dimensional structure of the present invention;
fig. 2 is a front view of the present invention;
fig. 3 is a rear view of the present invention;
fig. 4 is a top view of the present invention;
fig. 5 is a left side view of the present invention;
fig. 6 is a right side view of the present invention;
FIG. 7 is a stack structure of the fuser primitive in embodiment 2;
fig. 8 is a stacked structure of the fuser primitive in embodiment 3.
In the figure: 1. the fusion cage comprises a cage body, 101, a cage front edge, 102, a cage rear edge, 2, a cage primitive, 3, a cage hole channel, 301, a circular through hole, 302, a cylindrical intersection hole, 4, a cage notch, 5, a cage upper tooth and 6, a cage lower tooth.
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be described in detail below by way of example, but all the descriptions are only for illustrative purpose and should not be construed as forming any limitation to the present invention. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations. The present invention will be described in detail with reference to fig. 1 to 8.
Example 1:
a lotus-shaped gradient pore structure's porous titanium alloy lumbar vertebrae interbody fusion cage, it includes: the fusion cage comprises a fusion cage body 1, a plurality of fusion cage elements 2 and a plurality of fusion cage elements, wherein the fusion cage body is a structural member formed by repeatedly stacking a plurality of fusion cage elements 2 which are arranged in an array manner, the cross section of the fusion cage body is fusiform, and the top and the bottom of the sagittal plane of the fusion cage body are respectively in an inclined plane shape or a convex cambered surface shape; a cage pore passage 3 including a circular through hole 301 penetrating the cage element and having a lotus-shaped bionic porous structure, and a cylindrical intersection hole 302 formed between adjacent cage elements 2; the fusion cage notches 4 are at least one pair in number and are respectively arranged on one side/two sides of the fusion cage body 1.
The working principle is as follows: in the technical scheme, the fusion cage body 1 is a structural part formed by repeatedly stacking a plurality of fusion cage elements 2 which are arranged in an array manner, the cross section of the fusion cage body is in a fusiform shape, the top and the bottom of the sagittal plane of the fusion cage body are respectively in an inclined plane shape or a convex cambered surface shape, the fusion cage body is better matched with a vertebral body and better attached to an anatomical shape, and the fusion cage body can be customized and printed according to the condition of a patient; the fusion device element 2 is provided with a round through hole 301 with a lotus-root-shaped bionic porous structure in a penetrating way, and the size of a channel hole of the round through hole
And the number of the circular through holes 301 is 1-6, the circular through holes 301 are bionic simulation of lotus root open type through holes, are upper and lower through holes, have fluid permeability, can be used as a channel for transporting oxygen and nutrient substances, are beneficial to cell proliferation, migration and vascularization formation, are beneficial to nutrient absorption and metabolic waste discharge, are convenient for bone cell proliferation, migration and vascularization formation, enable the host bone and the Cage prosthesis implant to achieve biological combination (bone combination), maintain the long-term stability of Cage, the circular through holes 301 with open lotus root can reduce the elastic modulus of titanium alloy to be matched with the elastic modulus of a vertebral body, the matched elastic modulus avoids stress shielding effect, is more beneficial to bone fusion, can prevent the occurrence of sinking phenomenon, and preferably, the surfaces of the circular through holes 301 are rough, are beneficial to enhancing cell adhesion and promoting cell differentiation, can directly influence the osteogenic activity to achieve the aim of osseous combination; one side/two sides of the fusion device body 1 are openedAt least one pair of fusion device notches 4 are arranged, so that the fusion device can be conveniently held by an implantation device and can be conveniently implanted into a human body.
It should be noted that the length of the fusion device body can be, but is not limited to, one of 40mm, 45mm, 50mm and 55 mm; the width may be, but is not limited to, 22 mm; the superior-inferior height is the intervertebral space height (6 mm-16 mm), preferably 50mm and 9mm in length and height, respectively.
It should be further noted that the fusion cage body 1 is designed in a gradient structure, as shown in fig. 4, the porosity of the fusion cage elements 2 on the fusion cage body 1 is gradually reduced from inside to outside, the number of circular through holes of the fusion cage elements 2 in the middle of the fusion cage body 1 is 4-6, preferably 5; the number of the circular through holes of the fusion cage element 2 positioned at the edge of the fusion cage body 1 is 2-4, preferably 3; and the quantity that is located the 2 circular through-holes of fusion cage element between 1 middle part of fusion cage body and the edge is 3 ~ 5, and is preferred, and quantity is 4, adopts this gradient structural design for porosity is crescent from outside to inside on the fusion cage body 1, can match bone structure better, more is favorable to the bone to fuse, prevents the appearance of the sunken phenomenon of interbody fusion cage simultaneously.
Furthermore, it can be considered in this embodiment that the upper and lower ends of the fusion cage body 1 are further respectively provided with upper fusion cage teeth 5 and lower fusion cage teeth 6, the upper fusion cage teeth 5 and the lower fusion cage teeth 6 are respectively distributed along the outer edges of the upper and lower ends of the fusion cage body 1 at equal intervals, so as to further increase the stability between the fusion cage body and the vertebral body, preferably, the total height of the upper and lower fusion cage teeth is 2 mm.
Furthermore, it can be considered in this embodiment that the upper teeth 5 of the fusion cage are divided into two groups, one group being at least five, which are respectively distributed on the upper edge of the fusion cage body 1 in a corresponding manner, the lower teeth 6 of the fusion cage are divided into two groups, one group being at least five, which are respectively distributed on the lower edge of the fusion cage body 1 in a corresponding manner.
Furthermore, it can be considered in this embodiment that the fusion cage body 1 is a structural member integrally printed with a titanium alloy (Ti6Al4V) material by an electron beam melting technique of 3D printing, and is integrally printed with a titanium alloy (Ti6Al4V) material, and the titanium alloy powder is sintered layer by layer into a porous structure with a lotus-shaped pore structure by an electron beam melting technique (EBM) of 3D printing, so as to provide an open and interconnected environment for bone growth, and the structural units are repeatedly stacked to form the intervertebral fusion cage body, thereby meeting individual requirements of patients.
Example 2:
as shown in fig. 7, the fuser unit 2 is arranged in a rectangular array and repeatedly stacked to construct a fuser body 1 with a square structure. Preferably, the fuser primitive 2 is of size
The circular through-hole 301 has a passage hole size of
The number of the channel holes is 3/4/5, and the gradient is increased from outside to inside.
Example 3:
as shown in fig. 8, adjacent ones of the fuser members 2 are arranged in a staggered manner, so that any two adjacent fuser members 2 and the nearest fuser member 2 are arranged in an equilateral triangle, and are repeatedly stacked to form the fuser body 1 having a hexagonal structure. With a hexagonal structure, it is preferred that the fuser cell 2 is of a size
The circular through-hole 301 has a passage hole size of
The number of the channel holes is 3/4/5, and the gradient is increased from outside to inside.
It should be noted that, the size of the channel hole aperture of the circular through hole 301 may be further optimized, for example: the diameter of circular through-hole 301 gradually increases from outside to inside on the fusion cage body 1 to further make porosity gradually increase from outside to inside on the fusion cage body 1, can match bone structure better, more be favorable to the bone to fuse, prevent the appearance of the sunken phenomenon of interbody fusion cage simultaneously.
Further, it is also contemplated in embodiment 1/2/3 that the cage cell 2 has a cylindrical structure, the cage cell 2 has a diameter size of 1.5-5.5mm, the number of circular through holes 301 per cage cell 2 is 2-6, the surface of the circular through holes 301 is rough, and the diameter size of the circular through holes 301 is 200-1000 μm.
Still further, it is contemplated that in embodiment 1/2/3, the cross-section of the cylindrical intersection holes 302 may be one or more of a curved diamond-shaped hole and a curved triangular hole.
Further, it is also considered in embodiment 1/2/3 that the top of the fusion cage body 1 has a size and shape matching the lower surface of the upper vertebral body of the lesion, and is a bevel or an upwardly convex arc surface, the bottom of the fusion cage body 1 has a size and shape matching the upper surface of the lower vertebral body of the lesion, and is a bevel or a downwardly convex arc surface, the inclination of the bevel or arc surface may be, but not limited to, one of 0 °, 8 °, 10 °, and 15 °, which enables the best fit, and the printing may be customized according to the patient's condition, and preferably, the top and the bottom have a bevel structure, and the inclination is 8 °.
Further, it is also considered that in embodiment 1/2/3, the top and bottom of the fusion cage body 1 are inclined downward from the fusion cage front edge 101 to the fusion cage rear edge 102, and the height of the fusion cage body 1 is between 8 and 16mm, and preferably, the height of the fusion cage body is 9mm from the top to the bottom.
To sum up, the utility model provides a solve present interbody fusion cage follow-up visit in-process and take place the porous titanium alloy lumbar vertebrae interbody fusion cage of lotus root form gradient pore structure of sinking, the problem of unstable phenomenon easily.
The above embodiments are described in detail, but the above description is only for the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (10)
1. The utility model provides a lotus root form gradient pore structure's porous titanium alloy lumbar vertebrae interbody fusion cage which characterized in that: it includes:
the fusion cage comprises a fusion cage body (1), a plurality of fusion cage elements (2) which are arranged in an array manner and are repeatedly stacked to form a structural member, wherein the cross section of the fusion cage body is in a fusiform shape, and the top and the bottom of the sagittal plane of the fusion cage body are in an inclined plane shape or a convex cambered surface shape respectively;
the fusion device pore canal (3) comprises a round through hole (301) which is communicated with the fusion device element and is in a lotus-root-shaped bionic porous structure, and a cylindrical intersection hole (302) which is formed between the adjacent fusion device elements (2);
the fusion cage notches (4) are at least one pair in number and are respectively arranged on one side/two sides of the fusion cage body (1).
2. The porous titanium alloy lumbar interbody fusion cage with a lotus-shaped gradient pore structure as claimed in claim 1, wherein: the upper end and the lower end of the fusion cage body (1) are respectively provided with a fusion cage upper tooth (5) and a fusion cage lower tooth (6), and the fusion cage upper tooth (5) and the fusion cage lower tooth (6) are respectively distributed along the outer edges of the upper end and the lower end of the fusion cage body (1) at equal intervals.
3. The lotus-shaped gradient pore structure porous titanium alloy lumbar interbody fusion cage of claim 2, wherein: fuse ware and go up tooth (5) and divide into two sets of around, every group the quantity of fuse ware and go up tooth (5) is five at least, and the evenly distributed that corresponds around separately is in the upper end edge of fusing ware body (1), fuse ware lower tooth (6) divide into two sets of around, every group fuse ware lower tooth (6) quantity is five at least, the evenly distributed that corresponds around separately in the lower extreme edge of fusing ware body (1).
4. The lotus-shaped gradient pore structure porous titanium alloy lumbar interbody fusion cage of claim 3, wherein: the fusion cage body (1) is a structural member formed by integrally printing a titanium alloy material through an electron beam melting technology of 3D printing.
5. The lotus-shaped gradient pore structure porous titanium alloy lumbar interbody fusion cage of claim 4, wherein: the fusion cage elements (2) are arranged in a rectangular array manner and repeatedly stacked to form a fusion cage body (1) with a cubic structure.
6. The lotus-shaped gradient pore structure porous titanium alloy lumbar interbody fusion cage of claim 4, wherein: the adjacent fusion cage elements (2) are arranged in a staggered mode, so that any two adjacent fusion cage elements (2) and the fusion cage element (2) closest to the fusion cage element are arranged in an equilateral triangle mode and are repeatedly stacked to form the fusion cage body (1) with the hexagonal structure.
7. The porous titanium alloy lumbar interbody fusion cage with a lotus-shaped gradient pore structure as claimed in claim 5 or 6, wherein: the fuser primitive (2) is in a cylindrical structure, the diameter of the fuser primitive (2) is 1.5-5.5mm, the number of the circular through holes (301) on each fuser primitive (2) is 2-6, the surfaces of the circular through holes (301) are rough, and the diameter of the circular through holes (301) is 200-1000 mu m.
8. The porous titanium alloy lumbar interbody fusion cage with a lotus-shaped gradient pore structure as claimed in claim 7, wherein: the cross section of the cylindrical intersection hole (302) is one or more of a curved edge diamond hole and a curved edge triangular hole.
9. The porous titanium alloy lumbar interbody fusion cage with a lotus-shaped gradient pore structure as claimed in claim 8, wherein: the size and the shape of the top of the fusion cage body (1) are matched with the lower surface of the upper vertebral body at the pathological change position, the fusion cage body is in an inclined plane shape or an upward convex cambered surface shape, the size and the shape of the bottom of the fusion cage body (1) are matched with the upper surface of the lower vertebral body at the pathological change position, and the fusion cage body is in an inclined plane shape or a downward convex cambered surface shape.
10. The porous titanium alloy lumbar interbody fusion cage with a lotus-shaped gradient pore structure as claimed in claim 9, wherein: the top and the bottom of the fusion cage body (1) are inclined downwards from the front edge of the fusion cage to the rear edge of the fusion cage, and the height of the fusion cage body (1) is 8-16 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113413250A (en) * | 2021-07-01 | 2021-09-21 | 四川大学 | Spine repair system for actively inducing bone tissue regeneration fusion and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113413250A (en) * | 2021-07-01 | 2021-09-21 | 四川大学 | Spine repair system for actively inducing bone tissue regeneration fusion and manufacturing method thereof |
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